|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Metal and Polymer Matrix Composites II
||Nanotube Sheet - Graphite Hybrid Nanocomposite for Damage Detection
||Jiukun Li, Sirish Namilae
|On-Site Speaker (Planned)
In this study, we fabricate carbon nanotube (CNT) sheet–graphite powder hybrid nanocomposites, measure the strain dependent resistivity and utilize them for strain sensing repair of aerospace composites. CNT sheet–graphite powder nanocomposites are prepared by epoxy resin infiltration under vacuum followed by oven curing. The electrical resistivity of the composites is measured while simultaneously subjecting it to tensile loading. The resistivity of the nanocomposite films without load reduces from about 32.5x10-3 Ω∙cm to 16.7x10-3Ω∙cm by the addition of small amount of graphite powder. Additionally, the change in resistivity with tensile strain shows a significant improvement from 1.5x10-3 Ω∙cm to 8x10-3 Ω∙cm with graphite addition. There is an associated particle size effect. The improvements are observed only when the second phase is coarse graphitic particles and not for fine graphene flakes. We demonstrate the application of these nanocomposites in strain sensing patch repair of aerospace carbon-fiber composites.
||Planned: A print-only volume